Re: [Gegl-developer] TODO for GEGL 0.3

[Téo Mazars <teomazars gmail com>]

I am not convinced. The way it's done is fine in my opinion, mainly because it doesn't duplicate the implementation. What you suggest would be to create specialized meta operations foo-linear and foo-perceptual on top of foo with fixed "srgb" parameters and to hide foo... Right? I am not sure why this would help for anything, but I don't see anything wrong. And then it would be just a complement of what was suggested, still really easy to do :)

Kind regards,

Téo

2014-09-05 13:02 GMT+02:00 Øyvind Kolås <pippin gimp org>:

On Thu, Sep 4, 2014 at 9:48 PM, Teo Mazars
<mazarst ensimag grenoble-inp fr> wrote:
...
> add a "gamma-correction" toggle if needed (like the "srgb" boolean in over.

In this particular instance I would offer the opposite advice :).
Remove the "gamma-correction" toggle / "srgb" boolean, and create a
separate "gegl:over-perceptual" or "gegl:over-gamma" operation.

I consider what was done in GIMP with such sRGB booleans a hack; that
accidentally spread to the GEGL code base. From a GEGL
color-management perspective; over in linear light space; and over in
perceptual light space are two different (compositing) operations; and
from the perspective of applications using GEGL - it is easier to deal
with property/parameter-free compositors/layer-modes.

/pippin

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